Problem getting newer Version installed

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My computer worked fine for almost three years.
Now with uploading pictures suddenly I got a problem and it turned out, that my versions were too old: Fedors 9 and Firefox 3.
So I decided to try upgrading via iso or live DVD.
download worked fine with the checksum test and burning the DVD with Gnome Baker.
But I cannot get them to work.
I can see the first screen but upon my return the screen turns black and there is sound from the computer, that tells me it is working.
I am not deeply firm in Linux. Please give advice in simple steps.
(HowTos)

Stories similar to Problem getting newer Version installed

I've had a similar porblem with 10.04 which i could solve by using newer ALSA (an upgrade to 10.10 made it almost perfect). the sound never worked in HD mode but since i use analog stereo anyway that was ifne enough. when 12.04 came out i tested live everyhting worked so a fresh install was made. sound worked very well except when computer went to hibernation. so i turned of hibernaiton.